Machine for purifying cereal products or removing branny material therefrom



H. .1. DENHAM 7,007 MACHINE FOR PURIFYING CEREAL PRODUCTS OR REMOVING BRANNY MATERIAL THEREFROM Filed Jan. 2l, 1927 2 Sheets-Sheet P May 6, 19301 A ,30 tion to that of i Patented Mayl 6, 1930A` n Y ViiiiiiriraiivJQHN DENHAM, or MANQHESTER, .iiNGLAivD;l 'Assi'.-GNOR To HENRY siMoN Y Y minnen, tor MANCHESTER, iiNear.i.\.i\iii,1ii maitriser coiirriiiymf j l;

MACHINE FOR PAURIEYVING] CEREM. riiioiiiiocis'Yon..RiiiyioiiNe ia'miNitizEiyia'rr.anni

, i rijHEREEBOin. 4

. .'Aiiplvcationled ianuary21,A l1,927, SerialNo. 1762,640`an'd `in` Great :Britain` February V1`, 1926.-V l

' 1Machines for `purifying grain or cei'-eal products or for 'removing thel 'loran-nypartr Y cles of higli ash 'content having large; sur

" face Aand lowV weight, from the relatively Y dense particlesof, for yexample;"seino'lina.of lowash content having small lsurface and high weight, usually comprise a 'number of successive compartments. Each 4oflsucli compartments has Va 4silk -`baseer screen 4over.

1Q which the material is passedy andthrough which a flowgofr air )is induced bysuitable means .so that the lightest'materiai'liis*with-` `drawn the "draught, tliel heaviest materialdescends throughgtlie vscreengand Athe medium A material` remains VonV the yscreen and travels'` "through'thelmagchine*from compartment `to compartment juntil it passes-down a shoot or conduitup :which azstre'amof airiis drawn for the .purpose Vof making a inalseparation -tained without the employmentof a tail or iinal aspirating shoot with its attendant and-` well known disadvantages resulting from the? Y v y y ments fg, 'zy .and the divisions .h5 iland]c,-Z1of the action of the air moving vin a reverse directhe descending cereal products. Y A

My invention comprises the improved coinbination and arrangement of after described and claimed.

explanatory drawings Figure l is a sectional elevation and Figure 2 a cross sectional view of a grainpurifying machine constructed in one convenient form in accordance with my invention. The left hand portion of Figure 2 is taken'on the line portion on showing a modiedvarran'gement of machine.A Figure 5 1s a crosssectional view of a fur= ther modied arrangement.

parts hereinf Referring to the accompanying'l sheet of* .means*hereinafterreferredto. v p Thesame vrreference letters 1n the different viewsindicate thefsameor similar parts.

thefgrain or cereal vproduct tis fed inte `the l Referring'to Figures l-Bof the drawingsg machine ata and travels :overy a sieve `orf l screen b consisting of successive lengths lof.

VJsilk whichar'e of different mesh as in fusual practice. kThedivisions of the sieve'ac'cord in Figures lv and 4." 'Ihefsai'el isilk-sieve `-or screengbris mounted `in or formsV thefba'se ingfor reciprocating movement lis imparted in any welhknown Lmanner as 'ffor example, 'bythe eccentric-d, l and connecting rod le' aconsisting in part of a sprin'gf. l'Such vibrating -or/ .reciprocating movement 'of rthe screen whichisin the direction '-indi'cva'tedby the double-arrow Y Fig-ure 1' causes the grain* or "as 'manydcompartments as there 'are different meshes of sieve by divisionwallsw'f'and28;

-`bu-tadditional `walls 9 and l0 divideA two of said :compartments `into relatively large and 'fsmalzl divisions. The Vundividedvcompart- Aremaining compartmentsihaveee'h an indes 'ithezapertures 3m, p, mamy and-r. /Infthe com? Vallows the-.medium material .to remain onthe to fallth'erethrough. The divisions andalwhicli :are relatively A'siiial-l `have ta relatively strong `aspiration yapp-lied .thereto for carryi--l @if Afthe light `:particlesof .-b'ranny material and `delivering ithe -latterfintefthe -p ass age v:way

s fromWliliCh itis :deliveredsat'oneend ofthe :machine in the :known manner. 'iE-he aspiration-or `air exhaustion visi-applied to yall the compartments and divisionsthroughthe conf Adnitor passage .Sibut by controlling the sizes. of-the'apertures .1n-m0, p,-g,rI can obtain the desired L aspiration effects in the separate ',.inompartments er :divisione Such 4'control v`or o'fithesuspende'd frame 0 to whicha -lvibratf Tliefspaceralbove the screen isdivided-into partinents` or divisions g, il., jpk, the air. Yor 'aspirating currentfis gweaker than in the .fdivisionsa Z andwhilst'such*weakerlcurrent :silk orns'cre'en b,.it allows zthe heavymaterial i Larra1re attached t0 or. Orm-PT'O the' afore" adjustment may be obtained by means of a grid or perforated 'plate as t operated by a kscrew fu, fitted with nut v-as shown iii they detail view at Figure 6.

The .machine illustrated has two similarseries of compartments and divisions as vaforesaid arranged side by side as shown at Figure 2. l Y y With a0 particular mesh ofsilk or screen'.

beneath, for example, the Lcompartments 71, and z', fthe thickness of the grain or products upon the silk will be the leastin the'compart- 4ment i where the strong aspiratingactionVV removes the 4lighter particles of brannymaterialLf f Along the sides of the compartments I provide trays or troughs fw into which falls any dusty material or offal which tends to adhere toy and accumulate upon the compartmentv walls. The ends of the troughs projectin- Wards as shown in Figure` (which isa plan view of tliedelivery endsv of the troughs) into the compartment l so that the material from Y i the troughsis subjected to the strongaspiration in such compartment. ,The said troughs said suspended frame ofofthe screen b `The material which passes throughthe silk -or screen b `falls into a'trough as x beneath Y down the delivery shoot a. Y

f In the arrangement shown in yof the compartments is divided into small and large divisions'or sections, The cereal p rod- Y uct is also subjected tofan initial high aspirait and-is delivered from onegend of the-inachine a worm conveyor as y. ,The material remaining vupon .the silk-,or screen passesY Figure 4Leach tion at? 2. to reduce the quantity.. Vof light `branny material and dust passing through the compartments. 'With my machines, the cereal product dev liveredf'from thelast compartment as 1 is free from lighter particles of bran so that a final aspiration as the material descends the l terial at successive stages in its passage.V

delivery shoot .a is unnecessary.

Byapplying a strong aspiration tothe mai vthrough the :machine and whilst' it `is"V still. upon the silk, I accomplish the desired'puri# ication "thereof Awithout the complications f t necessitated by the usual tail aspiration Vin @which the air has to act upon particles moving in a, reverse vdirection lto itself; .The silk orscreen b is kept in a clean and eective conditionby means 'of brushes as 3 l Vcarried by the endless chain 4' and so that l they make contact-with and brushthe underside of the silk as illustrated at Figures 1 and V'Ihe chain is kept in motion through the u gear wheel 5 (Figure 2) Aorin any other well -V known manner.

` shouid a 'te found that ai -aaiiiig with any "particular cereal products, there is a tenden-V cy for too much of thelatter tobe carried over by the air. current inthelcompartments of strong aspiration, Imay' provide means for baiiiing and diverting such .air current so astol cause it to deposit the heavier materialv carried thereby. One convenient arrangementvof baiies for the compartments of strong or -h-igh aspiration is shown in Figure. 5 Where.

the air passes over tliebaflie 6 and under the baille 7 before passing` through the ports 7?.

.ing a plurality of sections of differentkmesh,

a casingenclosing a. space above said sieve, a longitudinal series of` transverse divisions dividing said casing intoas many compartments as there are different mesh sections fof sieve, a division wallacross'some of said com-f partmentstransverse to the direction of re-YV ciprocation dividing saidcompartments into relatively large and small divisions, and independent'lvalves upon each Vcompartment andv A each division of ay compartment` controlling the aspirating action vin' jeach compartmentfto give'a strong aspiration in the small divisions and a less strong ,aspiration -inthelarge divisions and compartments,'wherebytail aspira?, '1

efficiency of Vseparation increased.'y

tion at the endofthe sieve is obviated andthef;

In testimony whereof I have Vsignedmy name to this specification.

' HUMPHBEY- .ioHN DENHAM. 

